Objectives: To identify the optimal cutoff value in Hounsfield units (HU) of maxillary sinus (MS) opacity and bone thickness (neo-osteogenesis) of MS as radiological predictors for mycetoma. Methods: One hundred and sixty-four patients, including 59 patients with unilateral MS mycetoma, 31 with unilateral odontogenic maxillary sinusitis, 44 with chronic rhinosinusitis and 30 with rhinitis, who underwent sinus or turbinate surgery were recruited. The bone thickness, HU of the MS posterolateral wall...
Introduction: A number of patients with a diminished sense of smell also can suffer from parosmia. These patients with such a qualitative smell disorder are often more severely affected than patients exhibiting only a quantitative smell disorder. Qualitative smell disorders have heretofore been poorly investigated. The focus of the present study was, using functional MRI, to compare the central processing of olfactory stimulation in patients with qualitative smell disorders. Material and Methods:...
Introduction: A number of patients with a diminished sense of smell also can suffer from parosmia. These patients with such a qualitative smell disorder are often more severely affected than patients exhibiting only a quantitative smell disorder. Qualitative smell disorders have heretofore been poorly investigated. The focus of the present study was, using functional MRI, to compare the central processing of olfactory stimulation in patients with qualitative smell disorders. Material and Methods: A total of 23 patients were investigated, 12 hyposmic patients without parosmia (HYP group) and 11 hyposmic patients with parosmia (PAR group). Both groups were matched with regard to sex and age. The olfactory smells used were peach and coffee odors. Results: The two groups exhibited different patterns of activation. In HYP patients a stronger activation was observed in the medial orbitofrontal cortex, anterior cingulate cortex, and parahippocampal gyrus, whereas in the PAR group stronger activation in the thalamus and putamen was seen. Discussion: These results are consistent with the hypothesis that there are specific patterns in the central processing of olfactory stimuli which differ in hyposmic patients with and without parosmia.
ORL
Objectives: To identify the optimal cutoff value in Hounsfield units (HU) of maxillary sinus (MS) opacity and bone thickness (neo-osteogenesis) of MS as radiological predictors for mycetoma. Methods: One hundred and sixty-four patients, including 59 patients with unilateral MS mycetoma, 31 with unilateral odontogenic maxillary sinusitis, 44 with chronic rhinosinusitis and 30 with rhinitis, who underwent sinus or turbinate surgery were recruited. The bone thickness, HU of the MS posterolateral wall and sinus opacity were evaluated using computed tomography scan. Results: The bone thickness of the MS posterolateral wall in the mycetoma group was significantly higher than that in the odontogenic sinusitis and chronic rhinosinusitis (CRS) groups (p #x3c; 0.0001). The HU of the sinus opacity in the mycetoma group were significantly higher than those in the odontogenic and CRS groups (p #x3c; 0.0001). An optimal cutoff HU of sinus opacity #x3e;101.17 yielded a sensitivity of 96.6 and specificity of 100% for the diagnosis of MS mycetoma. An optimal cutoff of bone thickness #x3e;0.305 cm yielded a sensitivity of 84.7 and specificity of 60% for the diagnosis of MS mycetomas. Conclusions: The radiographic density measurement of MS opacification has a high predictive value for the diagnosis of MS mycetoma while radiographic neo-osteogenesis has not.
ORL
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